HBM
  • Home
  • Internal Audit
    • Overview
    • Outsourced Internal Audit
    • Co-sourced Internal Audit
    • Audit Committee Support
    • Our Approach
  • Advisory Services
    • Governance
    • Enterprise Risk Mgmt
    • Compliance
    • Business Continuity & CM
    • Climate Change Risk
    • Change Management
    • Work Health & Safety
  • About
    • Who We Are
    • Dan Crogan
    • Vission Perey
  • Contact
  • More
    • Home
    • Internal Audit
      • Overview
      • Outsourced Internal Audit
      • Co-sourced Internal Audit
      • Audit Committee Support
      • Our Approach
    • Advisory Services
      • Governance
      • Enterprise Risk Mgmt
      • Compliance
      • Business Continuity & CM
      • Climate Change Risk
      • Change Management
      • Work Health & Safety
    • About
      • Who We Are
      • Dan Crogan
      • Vission Perey
    • Contact
HBM
  • Home
  • Internal Audit
    • Overview
    • Outsourced Internal Audit
    • Co-sourced Internal Audit
    • Audit Committee Support
    • Our Approach
  • Advisory Services
    • Governance
    • Enterprise Risk Mgmt
    • Compliance
    • Business Continuity & CM
    • Climate Change Risk
    • Change Management
    • Work Health & Safety
  • About
    • Who We Are
    • Dan Crogan
    • Vission Perey
  • Contact

Co-sourced Internal Audit Services

Strengthening your Internal Audit capability through specialist expertise, additional capacity, and independent assurance.

HBM partners with organisations to enhance existing Internal Audit functions by providing experienced professionals, specialist audit expertise, and flexible resources that integrate seamlessly with your internal team.


Whether you require additional audit capacity, specialist knowledge, or support for complex engagements, our co-sourced Internal Audit services are tailored to complement your organisation while maintaining independence and delivering practical, risk-based assurance.

Book a Consultation

A Collaborative Approach to Internal Audit

When is Co-sourced Internal Audit Right for Your Organisation?

When is Co-sourced Internal Audit Right for Your Organisation?

Every organisation has different Internal Audit needs. While some maintain a mature Internal Audit function, others may require additional expertise, resources, or specialist skills to meet evolving business risks and stakeholder expectations.


HBM's Co-sourced Internal Audit service provides a flexible solution that strengthens your existing capability while allowing your organisation to retain oversight and ownership of the Internal Audit function.


We work as an extension of your Internal Audit team, delivering independent assurance and practical insights that add value to your organisation.

When is Co-sourced Internal Audit Right for Your Organisation?

When is Co-sourced Internal Audit Right for Your Organisation?

When is Co-sourced Internal Audit Right for Your Organisation?

Our co-sourced model is ideal for organisations that: 


✔ Have an existing Internal Audit function but require additional capacity

✔ Need specialist expertise for complex or technical audits

✔ Require support during periods of organisational change or growth

✔ Want an independent perspective on high-risk areas

✔ Need additional resources to deliver the Annual Internal Audit Plan

✔ Require temporary support during recruitment or staff shortages

✔ Wish to enhance the capability of their Internal Audit team

How HBM Supports Your Internal Audit Function

Our professionals work alongside your Internal Audit team to provide additional expertise where it is needed most. 

Specialist Internal Audit Resources

Specialist Internal Audit Resources

Specialist Internal Audit Resources

Experienced Internal Auditors who integrate seamlessly into your organisation and work collaboratively with your existing team. 

Risk-Based Audit Delivery

Specialist Internal Audit Resources

Specialist Internal Audit Resources

Support in delivering audits focused on strategic, operational, financial, compliance, and emerging risks.

Technical & Specialist Audits

Specialist Internal Audit Resources

Technical & Specialist Audits

Access to experienced professionals for specialised audit engagements, including governance reviews, internal controls, compliance, cyber, and operational audits.

Annual Audit Plan Delivery

Annual Audit Plan Delivery

Technical & Specialist Audits

 Additional audit resources to help complete your approved Internal Audit Plan on time and to a high professional standard.

Quality Assurance & Review

Annual Audit Plan Delivery

Quality Assurance & Review

Independent review of audit workpapers, methodologies, and reporting to strengthen audit quality and consistency. 

Audit Committee Support

Annual Audit Plan Delivery

Quality Assurance & Review

Professional reporting, presentations, and assurance that support effective governance and oversight by the Audit Committee and Board. 

Why Partner with HBM?

 Co-sourcing strengthens your existing Internal Audit function by providing specialist expertise, additional capacity, and independent assurance, while allowing your organisation to retain oversight and flexibility.

Flexible Engagement

Independent Perspective

Specialist Knowledge

Scale Internal Audit resources up or down depending on organisational priorities and audit requirements.

Specialist Knowledge

Independent Perspective

Specialist Knowledge

Access experienced professionals with expertise across governance, risk management, compliance, operational performance, and internal controls. 

Independent Perspective

Independent Perspective

Independent Perspective

Benefit from objective assurance and fresh insights that complement your internal knowledge.

Capability Development

Cost-Effective Solution

Independent Perspective

Share knowledge and best practices with your Internal Audit team to strengthen internal capability over time. 

Cost-Effective Solution

Cost-Effective Solution

Cost-Effective Solution

Gain access to highly experienced professionals without the long-term costs associated with permanent recruitment. 

Seamless Integration

Cost-Effective Solution

Cost-Effective Solution

Our professionals work collaboratively with your Internal Audit team, management, and stakeholders while respecting your existing governance arrangements and organisational culture. 

Our Co-sourced Internal Audit Services

HBM can support your Internal Audit function in a variety of ways, including:


  • Delivery of individual Internal Audit engagements 
  • Specialist governance and compliance reviews 
  • Internal control assessments 
  • Operational audits 
  • Project assurance reviews 
  • Procurement and contract audits 
  • Risk management reviews 
  • Third-party assurance 
  • Audit planning and risk assessments 
  • Quality Assurance Improvement Program (QAIP) reviews 
  • Audit Committee reporting and presentations

The HBM Internal Audit Approach

Every engagement follows our structured, risk-based Internal Audit methodology to ensure consistency, independence, and value.


  1. Understand Your Organisation
  2. Assess Risks
  3. Plan the Audit
  4. Execute the Audit
  5. Report Findings
  6. Follow-Up & Continuous Improvement

Learn More About Our Approach

Benefits of Co-sourcing with HBM

Benefits of Co-sourcing with HBM

Benefits of Co-sourcing with HBM

Partnering with HBM enables your organisation to:

  • Enhance the capability of your Internal Audit function 
  • Access specialist expertise when required 
  • Deliver the Annual Internal Audit Plan more effectively 
  • Strengthen governance and accountability 
  • Improve audit quality and consistency 
  • Increase confidence for the Audit Committee and Board 
  • Respond quickly to emerging risks 
  • Improve organisational resilience

Who We Work With

Benefits of Co-sourcing with HBM

Benefits of Co-sourcing with HBM

HBM provides Co-sourced Internal Audit services to organisations across a range of sectors, including:

  • Government 
  • Local Government 
  • Manufacturing 
  • Infrastructure 
  • Utilities 
  • Energy 
  • Healthcare 
  • Education 
  • Not-for-Profit 
  • Professional Services 
  • Financial Services

Frequently Asked Questions

How is Co-sourced Internal Audit different from Outsourced Internal Audit?

With a co-sourced model, your organisation retains its Internal Audit function while HBM provides additional expertise, specialist resources, or temporary support. This allows you to strengthen capability without replacing your existing team. 

Can HBM assist with specialist audit engagements only?

Yes. We can support specific audit projects, technical reviews, or specialist engagements where additional expertise is required. 

Will HBM work with our existing Internal Audit methodology?

Yes. We can work within your established methodology or, where appropriate, recommend enhancements aligned with leading professional practices and the Global Internal Audit Standards. 

Can HBM attend Audit Committee meetings?

Yes. Our professionals can present audit findings, discuss recommendations, and provide independent assurance directly to the Audit Committee or Board. 

Why HBM?

HBM is a trusted partner to Boards, Audit Committees, and Executive Leadership, providing flexible co-sourced Internal Audit solutions that strengthen governance and enhance organisational capability.


Our professionals work collaboratively with your Internal Audit team, complementing your existing expertise with independent assurance, specialist knowledge, and practical insights.


By working alongside your organisation, we help deliver a high-performing Internal Audit function that supports better decision-making, improves risk management, and creates sustainable value.

Ready to Strengthen Your Internal Audit Function?

Whether you require specialist expertise, additional audit capacity, or support delivering your Internal Audit Plan, HBM provides flexible co-sourced solutions tailored to your organisation's needs.


Partner with HBM to enhance your Internal Audit capability while maintaining the independence, quality, and assurance your Board expects.

Book a Consultation

Copyright © 2026 HBM - All Rights Reserved.

Powered by

This website uses cookies.

We use cookies to analyze website traffic and optimize your website experience. By accepting our use of cookies, your data will be aggregated with all other user data.

Accept